Compressed geometry and textures
Compressed geometry and textures reduce asset transfer size and can reduce GPU texture storage when the device supports the resulting format.
The ABeautifulGame sample demonstrates this capability. Drag to orbit and scroll to zoom.
API
createScenegraphsFromGLTF() consumes postprocessed loader output. Use getGLTFExtensionSupport() to inspect document capabilities and strictExtensions: true to reject unsupported required extensions before GPU scene creation. Compression decoding belongs to the loader; GPU texture upload belongs to the runtime adapter.
import {createScenegraphsFromGLTF, getGLTFExtensionSupport} from '@luma.gl/gltf';
// gltf is decoded and postprocessed by @loaders.gl/gltf.
for (const capability of getGLTFExtensionSupport(gltf).values()) {
console.log(capability.extensionName, capability.supportLevel);
}
const scenegraphs = createScenegraphsFromGLTF(device, gltf, {
strictExtensions: true
});
BasisU upload checks device format support. Optional unsupported formats use a fallback, while required unsupported formats fail strict checks. WebP depends on browser decoding; EXT_texture_avif source selection is unsupported by the installed glTF loader.
glTF support
KHR_draco_mesh_compression, EXT_meshopt_compression, and KHR_meshopt_compression route through loader decoding. KHR_mesh_quantization preserves compact vertex representations. KHR_texture_basisu supplies BasisU/KTX2 texture sources; WebP source selection uses EXT_texture_webp. The embedded sample opens the Draco/KTX2 variant of ABeautifulGame.
See glTF materials and textures, glTF animation, and the extension support matrix for adapter details and current support limits.